Method of cooling animals

ABSTRACT

A method and apparatus for cooling an animal in a place such as a milking stall or feeding stall wherein an artificial climate is created. The artificial climate disclosed comprises wetting the animal with a water vapor and causing an air flow over the wetted area of the animal. Water vapor is sprayed and rubbed onto the back of the animal while shields protect areas to remain dry. During the process the animal is monitored for signs of thermal stress using a variety of methods and the wetting and cooling process are discontinued if the artificial climate adversely affects the animal.

RELATED APPLICATION

[0001] This Application is a continuation of International Application No. PCT/NL00/00504, filed Jul. 18, 2000.

FIELD OF THE INVENTION

[0002] The invention relates to a method of cooling animals in a stable.

BACKGROUND OF THE INVENTION

[0003] In a known method, for example, water droplets are dispersed through the stable by means of air ventilation for the purpose of cooling the animals.

[0004] This method has the disadvantage of water being distributed throughout the stable, so that an excess of water is required. A further disadvantage of the known method is that air flow means is the only method used for transporting the water droplets.

SUMMARY OF THE INVENTION

[0005] In view of the foregoing, the invention aims at a method in which the above-mentioned drawbacks are obviated or at least minimized. In accordance with the invention, this is achieved by liquid application between the hairs or on the skin, or by a combination of both, of the animal, whereupon air is blown over the liquid. In this manner the evaporation of the liquid is optimally utilized, so that an optimal cooling of the animal is obtained. According to a further inventive feature, an even better cooling is obtained if the liquid is atomized to a fine spray. According to another inventive feature, the liquid is rubbed between the hairs or on the skin, or a combination of both, of the animal. According to another inventive feature, the liquid is applied between the hairs or on the skin, or both, of the animal by rubbing or brushing, or a combination of both. In order to avoid the use of too much liquid, according to an inventive feature, a previously determined maximum amount of liquid per animal is applied to the animal.

[0006] Upon wetting the animal, it is important to avoid the formation of unevenly large droplets, because large droplets evaporate less readily. Furthermore, formation of droplets may result in the liquid reaching restricted places where wetting is not desired, such as, for example, the teats of an animal to be milked. Therefore, according to an inventive feature, during wetting, the animal is checked to determine whether droplets are formed on the animal's skin or falling from the animal. According to an inventive feature, wetting of the animal is stopped if formations of droplets are ascertained during wetting. Formation of droplets can be recorded, for example, by optical means such as picture recognition. According to another inventive feature, the back of the animal is cooled. In order to avoid wetting certain restricted parts of the animal unintentionally with liquid, according to an inventive feature, during wetting or cooling, or both, the animal's undesired parts are shielded. It is desirable, for example, to shield the head and the udder or the teats, or both, of the animal. Therefore, the invention teaches a method of protecting certain parts of an animal, such as a cow, during treating the animal, such as cooling the animal, whereby at least during part of the treatment certain parts of the body to be protected are shielded against the relevant treatment with the aid of a shielding means. According to a further inventive feature, the udder or the teats of the animal or the animal's head, or both, are shielded.

[0007] For the purpose of monitoring the cooling process of the animal, according to an inventive feature, the animal's temperature, in particular the temperature of the skin or the body or the ambient temperature in the vicinity of the part of the animal to be cooled or two more temperatures, is determined. According to another inventive feature, cooling is stopped when a predetermined temperature is reached. In order to avoid exposing the animal to stress during cooling, according to an inventive feature, the animal's behavior is observed during cooling, and cooling is stopped if the animal's behavior changes. According to another aspect of the invention, the animal's behavior can be deduced from deviations from a determined set number of movements of the animal per unit of time. In practice it has been found that animals experience cooling as a pleasant sensation during or prior to milking, or both. According to the invention, it has further been found that the animals go to the milking stall spontaneously if they are cooled there.

[0008] The invention also relates to a method in which stress, for example, heat stress, of the animals to be cooled is ascertained, whereupon it is decided whether or not to cool the animal as described using the foregoing method. The invention also relates to a method in which heat stress is ascertained on the basis of an infrared picture of the animal. The invention also teaches a method where the period of time during which the animal is cooled or the intensity of cooling, or both, depend on a heat stress factor which is determined from an infrared picture.

[0009] The invention further teaches a method in which stress, for example, heat stress, of the animal is ascertained on the basis of the position of the animal's ears. According to another method, stress, such as heat stress, of the animal is ascertained by determining the wetness of the animal's coat. According to a further aspect of the method, stress, such as heat stress, of the animal is ascertained by determining the activity of the animal. According to another feature of the method, stress, such as heat stress, of the animal is ascertained by determining the expression of the animal's eyes. According to again another aspect of the method, stress, such as heat stress, of the animal is ascertained by determining the animal's breath or breathing, or both. According to another aspect of the method, stress, such as heat stress, of the animal is ascertained by determining the tension of its muscles, in particular, the back muscles, of the animal. According to again another aspect of the method, stress, such as heat stress, of the animal is ascertained by determining if the animal is walking with its tongue out.

[0010] The invention also relates to a device for applying the methods as described above, whereby the device is provided with wetting means with the aid of which a liquid is reduced to a fine spray for application to at least part of the animal, in particular between the hairs or on the skin, or both, of that part of the animal. An air flow is directed over the wetted part with the aid of air displacing means. According to a further inventive feature, the wetting means comprises a liquid atomization device. By means of the liquid atomization device it is possible to apply, for example, a fine spray of water to the animal. The wetting means may further comprise a brushing device. According to another inventive feature, the air displacing means comprises a controlling means with the aid of which the amount of air to be displaced or the velocity of the air to be displaced, or both, is set. The aforementioned cooling methods and means combined with temperature measurements make it possible to control cooling of the animal very accurately. According to a further inventive feature, the device is arranged in a milking compartment or a foremilking compartment or a cleaning compartment or in a post-treatment compartment for milking or for cleaning certain parts, such as the teats, of the animal. According to again another inventive feature, there is disposed a milking robot in the milking compartment, by means of which teat cups are automatically connected to the teats of the animal to be milked.

[0011] In accordance with a further aspect of the invention, the device comprises means for determining stress, in particular heat stress, of an animal. According to another inventive feature, the stress determining means comprises a camera, such as, for example, an infrared camera. According to again another inventive feature, the stress means comprises a hydrometer. According to a further inventive feature, the stress determining means comprises an odor meter.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The invention will now be explained in further detail with reference to the accompanying drawings, in which:

[0013]FIG. 1 is a schematic side elevational view of a first embodiment of the invention; and

[0014]FIG. 2 is a view similar to FIG. 1 which shows a second embodiment of a device according to the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015]FIG. 1 is a side view of a milking compartment 1 with a cow 2 present therein. Milking compartment 1 comprises a milking robot 3 with teat cups 4 which are connected automatically to the teats of cow 2 by means of the milking robot 3. Near the front side of the milking compartment 1 there is further disposed a feeding trough 5 to which feed can be supplied in metered portions. Milking compartment 1 is further provided with regulating means 6 with the aid of which at least one previously determined climate parameter is set artificially in milking compartment 1. Regulating means 6 comprise wetting means 7 with the aid of which at least the back of cow 2 is wetted. Wetting means 7 comprises a sprayer beam 8 with nozzles 9, by means of which a liquid can be atomized to a fine spray. The liquid is reduced to a fine spray and is applied to the back of cow 2. Air is directed over the wetted surface by means of sprayer beam 8 and nozzles 9. In this manner the back of cow 2 is cooled. During wetting cow 2 is monitored with the aid of a detection means 10 to determine whether or not formation of droplets takes place. Detection means 10 comprises a camera 11. In order to prevent certain parts of cow 2 from coming into contact with the liquid, milking compartment 1 is further provided with shielding means 12. In the present embodiment the shielding means 12 comprises a transparent shielding cap 13 which covers the head of the cow 2 during wetting. Shielding means 12 further comprises a second shielding cap 14 by means of which the udder of cow 2 can be shielded. The second shielding cap 14 is fitted with a pivoting means to the milk box 1.

[0016]FIG. 2 shows a second embodiment of the invention, in which parts corresponding to those of the first embodiment are indicated by the same reference numerals. In the second embodiment of the invention, wetting means 7 comprises motor-driven brushes 15 which are provided with liquid supply means so liquid can be supplied to brushes 15 during brushing. Thus, the liquid is rubbed in the hair of cow 2 by means of brushes 15. Motor-driven brushes 15 are disposed on a pivoting arm 16 which is connected to milking compartment 1. Pivoting arm 16 comprises an air displacing means 17 for directing air over the wetted surface of cow 2 after or during brushing.

[0017] Although we have disclosed the preferred embodiments of our invention, it is to be understood that it is capable of other adaptations within the scope of the following claims: 

38. A method of cooling an animal comprising the steps of applying a liquid between the hairs of the animal and blowing air over said liquid..
 39. A method in accordance with Claim 38, wherein said liquid is atomized to consist of a fine spray.
 40. A method in accordance with Claim 38, comprising rubbing said liquid between the hairs of said animal.
 41. A method in accordance with Claim 40, comprising brushing said liquid between the hairs of the animal by rubbing.
 42. A method in accordance with Claim 38, comprising predetermining a fixed maximum amount of said liquid to be applied to the animal.
 43. A method in accordance with claim 38, comprising the further step of monitoring said liquid which has been applied to the animal for the formation of droplets on the animal.
 44. A method in accordance with claim 43, comprising the step of discontinuing the application of liquid to the animal when droplets of said liquid are formed.
 45. A method in accordance with claim 38, wherein said blowing step is directed to the back of the animal.
 46. A method in accordance with claim 38, wherein certain parts of the animal are shielded from receiving said liquid.
 47. A method of protecting certain parts of an animal while cooling the animal with a water spray comprising shielding said parts against receiving said water spray.
 48. A method in accordance with claim 47, comprising shielding the udder and teats of the animal.
 49. A method in accordance with claim 47, comprising shielding the animal's head parts.
 50. A method in accordance with claim 38, comprising the further step of determining the temperature of the animal when it is receiving liquid while air is being blown over said liquid.
 51. A method in accordance with claim 50, which comprises discontinuing the application of said liquid and the blowing of said air when said temperature reaches a predetermined temperature.
 52. A method in accordance with claim 38, comprising the further steps of observing the animal's behavior during the method and discontinuing the application of liquid and the blowing of air on the animal when the animal's behavior changes to indicate that the method is adversely affecting the animal.
 53. A method in accordance with claim 52, comprising deducing that the animal is being adversely affected by the method from variations of the number of movements of the animal per unit of time.
 54. A method in accordance with claim 38, which comprises milking the animal while liquid is being applied to the animal and air is being blown over said liquid.
 55. A method in accordance with claim 38, comprising ascertaining whether the animal is undergoing thermal stress as the method progresses.
 56. A method in accordance with claim 55, comprising ascertaining whether the animal is undergoing thermal stress by infrared imaging.
 57. A method in accordance with claim 56, which comprises controlling the intensity of cooling based on the ongoing status of the animal as depicted by said infrared imaging.
 58. A method in accordance with claim 55, comprising monitoring the animal's ears to determine whether the animal is undergoing thermal stress.
 59. A method in accordance with claim 55, comprising monitoring the wetness of the animal's coat to determine whether the animal is undergoing thermal stress.
 60. A method in accordance with claim 55, comprising monitoring the activity of the animal to determine whether the animal is undergoing thermal stress as the method progresses.
 61. A method in accordance with claim 55, comprising monitoring the animal's eyes to determine whether the animal is undergoing thermal stress as the method progresses.
 62. A method in accordance with claim 55, which comprises monitoring the animal's breathing to determine whether the animal is suffering from thermal stress as the method progresses.
 63. A method in accordance with claim 55, comprising monitoring the tension of the animal's back muscles to determine whether the animal is undergoing thermal stress as the method progresses.
 64. A method in accordance with claim 55, comprising monitoring the animal's tongue position relative to its mouth to determine whether the animal is suffering from thermal stress as the method progresses.
 65. A device for cooling animals comprising a wetting means that reduces a liquid to a fine spray for application to at least part of an animal between the animal's hair and air flow producing means for producing an air flow directed over the wetted part of the animal.
 66. A device in accordance with claim 65, wherein said wetting means comprises a liquid atomization device.
 67. A device in accordance with claim 65, wherein said wetting means comprises a brushing device.
 68. A device in accordance with claim 65, wherein said air flow producing means comprises air displacing means, and comprising air flow controlling means for controlling the velocity of the air which is displaced by said air displacing means.
 69. A device in accordance with claim 65, wherein said device is combined with a milking compartment.
 70. A device in accordance with claim 69, comprising a milking robot in said milking compartment.
 71. A device in accordance with claim 65, comprising means for determining whether the animal is undergoing thermal stress.
 72. A device in accordance with claim 71, wherein said means for determining thermal stress comprises a camera.
 73. A device in accordance with claim 71, wherein said means for determining whether the animal is undergoing thermal stress comprises a hydrometer.
 74. A device in accordance with claim 71, wherein said means for determining whether the animal is undergoing thermal stress comprises an odor monitor. 